1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015, 2016 Alex Kost <alezost@gmail.com>
;;; Copyright © 2015, 2016 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
;;; Copyright © 2016, 2017 Leo Famulari <leo@famulari.name>
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services base)
#:use-module (guix store)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu services networking)
#:use-module (gnu system pam)
#:use-module (gnu system shadow) ; 'user-account', etc.
#:use-module (gnu system file-systems) ; 'file-system', etc.
#:use-module (gnu system mapped-devices)
#:use-module (gnu packages admin)
#:use-module ((gnu packages linux)
#:select (alsa-utils crda eudev e2fsprogs fuse gpm kbd lvm2 rng-tools))
#:use-module ((gnu packages base)
#:select (canonical-package glibc))
#:use-module (gnu packages bash)
#:use-module (gnu packages package-management)
#:use-module (gnu packages linux)
#:use-module (gnu packages lsof)
#:use-module (gnu packages terminals)
#:use-module ((gnu build file-systems)
#:select (mount-flags->bit-mask))
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:export (fstab-service-type
root-file-system-service
file-system-service-type
user-unmount-service
swap-service
user-processes-service
session-environment-service
session-environment-service-type
host-name-service
console-keymap-service
%default-console-font
console-font-service-type
console-font-service
udev-configuration
udev-configuration?
udev-configuration-rules
udev-service-type
udev-service
udev-rule
login-configuration
login-configuration?
login-service-type
login-service
agetty-configuration
agetty-configuration?
agetty-service
agetty-service-type
mingetty-configuration
mingetty-configuration?
mingetty-service
mingetty-service-type
%nscd-default-caches
%nscd-default-configuration
nscd-configuration
nscd-configuration?
nscd-cache
nscd-cache?
nscd-service-type
nscd-service
syslog-configuration
syslog-configuration?
syslog-service
syslog-service-type
%default-syslog.conf
%default-authorized-guix-keys
guix-configuration
guix-configuration?
guix-configuration-guix
guix-configuration-build-group
guix-configuration-build-accounts
guix-configuration-authorize-key?
guix-configuration-authorized-keys
guix-configuration-use-substitutes?
guix-configuration-substitute-urls
guix-configuration-extra-options
guix-configuration-log-file
guix-configuration-lsof
guix-service
guix-service-type
guix-publish-configuration
guix-publish-configuration?
guix-publish-service
guix-publish-service-type
gpm-configuration
gpm-configuration?
gpm-service-type
gpm-service
urandom-seed-service-type
urandom-seed-service
rngd-configuration
rngd-configuration?
rngd-service-type
rngd-service
kmscon-configuration
kmscon-configuration?
kmscon-service-type
pam-limits-service-type
pam-limits-service
%base-services))
;;; Commentary:
;;;
;;; Base system services---i.e., services that 99% of the users will want to
;;; use.
;;;
;;; Code:
\f
;;;
;;; File systems.
;;;
(define (file-system->fstab-entry file-system)
"Return a @file{/etc/fstab} entry for @var{file-system}."
(string-append (case (file-system-title file-system)
((label)
(string-append "LABEL=" (file-system-device file-system)))
((uuid)
(string-append
"UUID="
(uuid->string (file-system-device file-system))))
(else
(file-system-device file-system)))
"\t"
(file-system-mount-point file-system) "\t"
(file-system-type file-system) "\t"
(or (file-system-options file-system) "defaults") "\t"
;; XXX: Omit the 'fs_freq' and 'fs_passno' fields because we
;; don't have anything sensible to put in there.
))
(define (file-systems->fstab file-systems)
"Return a @file{/etc} entry for an @file{fstab} describing
@var{file-systems}."
`(("fstab" ,(plain-file "fstab"
(string-append
"\
# This file was generated from your GuixSD configuration. Any changes
# will be lost upon reboot or reconfiguration.\n\n"
(string-join (map file-system->fstab-entry
file-systems)
"\n")
"\n")))))
(define fstab-service-type
;; The /etc/fstab service.
(service-type (name 'fstab)
(extensions
(list (service-extension etc-service-type
file-systems->fstab)))
(compose concatenate)
(extend append)))
(define %root-file-system-shepherd-service
(shepherd-service
(documentation "Take care of the root file system.")
(provision '(root-file-system))
(start #~(const #t))
(stop #~(lambda _
;; Return #f if successfully stopped.
(sync)
(call-with-blocked-asyncs
(lambda ()
(let ((null (%make-void-port "w")))
;; Close 'shepherd.log'.
(display "closing log\n")
((@ (shepherd comm) stop-logging))
;; Redirect the default output ports..
(set-current-output-port null)
(set-current-error-port null)
;; Close /dev/console.
(for-each close-fdes '(0 1 2))
;; At this point, there are no open files left, so the
;; root file system can be re-mounted read-only.
(mount #f "/" #f
(logior MS_REMOUNT MS_RDONLY)
#:update-mtab? #f)
#f)))))
(respawn? #f)))
(define root-file-system-service-type
(shepherd-service-type 'root-file-system
(const %root-file-system-shepherd-service)))
(define (root-file-system-service)
"Return a service whose sole purpose is to re-mount read-only the root file
system upon shutdown (aka. cleanly \"umounting\" root.)
This service must be the root of the service dependency graph so that its
'stop' action is invoked when shepherd is the only process left."
(service root-file-system-service-type #f))
(define (file-system->shepherd-service-name file-system)
"Return the symbol that denotes the service mounting and unmounting
FILE-SYSTEM."
(symbol-append 'file-system-
(string->symbol (file-system-mount-point file-system))))
(define (mapped-device->shepherd-service-name md)
"Return the symbol that denotes the shepherd service of MD, a <mapped-device>."
(symbol-append 'device-mapping-
(string->symbol (mapped-device-target md))))
(define dependency->shepherd-service-name
(match-lambda
((? mapped-device? md)
(mapped-device->shepherd-service-name md))
((? file-system? fs)
(file-system->shepherd-service-name fs))))
(define (file-system-shepherd-service file-system)
"Return the shepherd service for @var{file-system}, or @code{#f} if
@var{file-system} is not auto-mounted upon boot."
(let ((target (file-system-mount-point file-system))
(device (file-system-device file-system))
(type (file-system-type file-system))
(title (file-system-title file-system))
(flags (file-system-flags file-system))
(options (file-system-options file-system))
(check? (file-system-check? file-system))
(create? (file-system-create-mount-point? file-system))
(dependencies (file-system-dependencies file-system)))
(and (file-system-mount? file-system)
(with-imported-modules '((gnu build file-systems)
(guix build bournish))
(shepherd-service
(provision (list (file-system->shepherd-service-name file-system)))
(requirement `(root-file-system
,@(map dependency->shepherd-service-name dependencies)))
(documentation "Check, mount, and unmount the given file system.")
(start #~(lambda args
#$(if create?
#~(mkdir-p #$target)
#t)
(let (($PATH (getenv "PATH")))
;; Make sure fsck.ext2 & co. can be found.
(dynamic-wind
(lambda ()
(setenv "PATH"
(string-append
#$e2fsprogs "/sbin:"
"/run/current-system/profile/sbin:"
$PATH)))
(lambda ()
(mount-file-system
`(#$device #$title #$target #$type #$flags
#$options #$check?)
#:root "/"))
(lambda ()
(setenv "PATH" $PATH)))
#t)))
(stop #~(lambda args
;; Normally there are no processes left at this point, so
;; TARGET can be safely unmounted.
;; Make sure PID 1 doesn't keep TARGET busy.
(chdir "/")
(umount #$target)
#f))
;; We need an additional module.
(modules `(((gnu build file-systems)
#:select (mount-file-system))
,@%default-modules)))))))
(define (file-system-shepherd-services file-systems)
"Return the list of Shepherd services for FILE-SYSTEMS."
(let* ((file-systems (filter file-system-mount? file-systems)))
(define sink
(shepherd-service
(provision '(file-systems))
(requirement (cons* 'root-file-system 'user-file-systems
(map file-system->shepherd-service-name
file-systems)))
(documentation "Target for all the initially-mounted file systems")
(start #~(const #t))
(stop #~(const #f))))
(cons sink (map file-system-shepherd-service file-systems))))
(define file-system-service-type
(service-type (name 'file-systems)
(extensions
(list (service-extension shepherd-root-service-type
file-system-shepherd-services)
(service-extension fstab-service-type
identity)))
(compose concatenate)
(extend append)))
(define user-unmount-service-type
(shepherd-service-type
'user-file-systems
(lambda (known-mount-points)
(shepherd-service
(documentation "Unmount manually-mounted file systems.")
(provision '(user-file-systems))
(start #~(const #t))
(stop #~(lambda args
(define (known? mount-point)
(member mount-point
(cons* "/proc" "/sys" '#$known-mount-points)))
;; Make sure we don't keep the user's mount points busy.
(chdir "/")
(for-each (lambda (mount-point)
(format #t "unmounting '~a'...~%" mount-point)
(catch 'system-error
(lambda ()
(umount mount-point))
(lambda args
(let ((errno (system-error-errno args)))
(format #t "failed to unmount '~a': ~a~%"
mount-point (strerror errno))))))
(filter (negate known?) (mount-points)))
#f))))))
(define (user-unmount-service known-mount-points)
"Return a service whose sole purpose is to unmount file systems not listed
in KNOWN-MOUNT-POINTS when it is stopped."
(service user-unmount-service-type known-mount-points))
(define %do-not-kill-file
;; Name of the file listing PIDs of processes that must survive when halting
;; the system. Typical example is user-space file systems.
"/etc/shepherd/do-not-kill")
(define user-processes-service-type
(shepherd-service-type
'user-processes
(lambda (grace-delay)
(shepherd-service
(documentation "When stopped, terminate all user processes.")
(provision '(user-processes))
(requirement '(file-systems))
(start #~(const #t))
(stop #~(lambda _
(define (kill-except omit signal)
;; Kill all the processes with SIGNAL except those listed
;; in OMIT and the current process.
(let ((omit (cons (getpid) omit)))
(for-each (lambda (pid)
(unless (memv pid omit)
(false-if-exception
(kill pid signal))))
(processes))))
(define omitted-pids
;; List of PIDs that must not be killed.
(if (file-exists? #$%do-not-kill-file)
(map string->number
(call-with-input-file #$%do-not-kill-file
(compose string-tokenize
(@ (ice-9 rdelim) read-string))))
'()))
(define (now)
(car (gettimeofday)))
(define (sleep* n)
;; Really sleep N seconds.
;; Work around <http://bugs.gnu.org/19581>.
(define start (now))
(let loop ((elapsed 0))
(when (> n elapsed)
(sleep (- n elapsed))
(loop (- (now) start)))))
(define lset= (@ (srfi srfi-1) lset=))
(display "sending all processes the TERM signal\n")
(if (null? omitted-pids)
(begin
;; Easy: terminate all of them.
(kill -1 SIGTERM)
(sleep* #$grace-delay)
(kill -1 SIGKILL))
(begin
;; Kill them all except OMITTED-PIDS. XXX: We would
;; like to (kill -1 SIGSTOP) to get a fixed list of
;; processes, like 'killall5' does, but that seems
;; unreliable.
(kill-except omitted-pids SIGTERM)
(sleep* #$grace-delay)
(kill-except omitted-pids SIGKILL)
(delete-file #$%do-not-kill-file)))
(let wait ()
(let ((pids (processes)))
(unless (lset= = pids (cons 1 omitted-pids))
(format #t "waiting for process termination\
(processes left: ~s)~%"
pids)
(sleep* 2)
(wait))))
(display "all processes have been terminated\n")
#f))
(respawn? #f)))))
(define* (user-processes-service #:key (grace-delay 4))
"Return the service that is responsible for terminating all the processes so
that the root file system can be re-mounted read-only, just before
rebooting/halting. Processes still running GRACE-DELAY seconds after SIGTERM
has been sent are terminated with SIGKILL.
The returned service will depend on 'file-systems', meaning that it is
considered started after all the auto-mount file systems have been mounted.
All the services that spawn processes must depend on this one so that they are
stopped before 'kill' is called."
(service user-processes-service-type grace-delay))
\f
;;;
;;; Preserve entropy to seed /dev/urandom on boot.
;;;
(define %random-seed-file
"/var/lib/random-seed")
(define (urandom-seed-shepherd-service _)
"Return a shepherd service for the /dev/urandom seed."
(list (shepherd-service
(documentation "Preserve entropy across reboots for /dev/urandom.")
(provision '(urandom-seed))
(requirement '(user-processes))
(start #~(lambda _
;; On boot, write random seed into /dev/urandom.
(when (file-exists? #$%random-seed-file)
(call-with-input-file #$%random-seed-file
(lambda (seed)
(call-with-output-file "/dev/urandom"
(lambda (urandom)
(dump-port seed urandom))))))
;; Immediately refresh the seed in case the system doesn't
;; shut down cleanly.
(call-with-input-file "/dev/urandom"
(lambda (urandom)
(let ((previous-umask (umask #o077))
(buf (make-bytevector 512)))
(mkdir-p (dirname #$%random-seed-file))
(get-bytevector-n! urandom buf 0 512)
(call-with-output-file #$%random-seed-file
(lambda (seed)
(put-bytevector seed buf)))
(umask previous-umask))))
#t))
(stop #~(lambda _
;; During shutdown, write from /dev/urandom into random seed.
(let ((buf (make-bytevector 512)))
(call-with-input-file "/dev/urandom"
(lambda (urandom)
(let ((previous-umask (umask #o077)))
(get-bytevector-n! urandom buf 0 512)
(mkdir-p (dirname #$%random-seed-file))
(call-with-output-file #$%random-seed-file
(lambda (seed)
(put-bytevector seed buf)))
(umask previous-umask))
#t)))))
(modules `((rnrs bytevectors)
(rnrs io ports)
,@%default-modules)))))
(define urandom-seed-service-type
(service-type (name 'urandom-seed)
(extensions
(list (service-extension shepherd-root-service-type
urandom-seed-shepherd-service)))))
(define (urandom-seed-service)
(service urandom-seed-service-type #f))
;;;
;;; Add hardware random number generator to entropy pool.
;;;
(define-record-type* <rngd-configuration>
rngd-configuration make-rngd-configuration
rngd-configuration?
(rng-tools rngd-configuration-rng-tools) ;package
(device rngd-configuration-device)) ;string
(define rngd-service-type
(shepherd-service-type
'rngd
(lambda (config)
(define rng-tools (rngd-configuration-rng-tools config))
(define device (rngd-configuration-device config))
(define rngd-command
(list (file-append rng-tools "/sbin/rngd")
"-f" "-r" device))
(shepherd-service
(documentation "Add TRNG to entropy pool.")
(requirement '(udev))
(provision '(trng))
(start #~(make-forkexec-constructor #$@rngd-command))
(stop #~(make-kill-destructor))))))
(define* (rngd-service #:key
(rng-tools rng-tools)
(device "/dev/hwrng"))
"Return a service that runs the @command{rngd} program from @var{rng-tools}
to add @var{device} to the kernel's entropy pool. The service will fail if
@var{device} does not exist."
(service rngd-service-type
(rngd-configuration
(rng-tools rng-tools)
(device device))))
;;;
;;; System-wide environment variables.
;;;
(define (environment-variables->environment-file vars)
"Return a file for pam_env(8) that contains environment variables VARS."
(apply mixed-text-file "environment"
(append-map (match-lambda
((key . value)
(list key "=" value "\n")))
vars)))
(define session-environment-service-type
(service-type
(name 'session-environment)
(extensions
(list (service-extension
etc-service-type
(lambda (vars)
(list `("environment"
,(environment-variables->environment-file vars)))))))
(compose concatenate)
(extend append)))
(define (session-environment-service vars)
"Return a service that builds the @file{/etc/environment}, which can be read
by PAM-aware applications to set environment variables for sessions.
VARS should be an association list in which both the keys and the values are
strings or string-valued gexps."
(service session-environment-service-type vars))
\f
;;;
;;; Console & co.
;;;
(define host-name-service-type
(shepherd-service-type
'host-name
(lambda (name)
(shepherd-service
(documentation "Initialize the machine's host name.")
(provision '(host-name))
(start #~(lambda _
(sethostname #$name)))
(respawn? #f)))))
(define (host-name-service name)
"Return a service that sets the host name to @var{name}."
(service host-name-service-type name))
(define (unicode-start tty)
"Return a gexp to start Unicode support on @var{tty}."
;; We have to run 'unicode_start' in a pipe so that when it invokes the
;; 'tty' command, that command returns TTY.
#~(begin
(let ((pid (primitive-fork)))
(case pid
((0)
(close-fdes 0)
(dup2 (open-fdes #$tty O_RDONLY) 0)
(close-fdes 1)
(dup2 (open-fdes #$tty O_WRONLY) 1)
(execl #$(file-append kbd "/bin/unicode_start")
"unicode_start"))
(else
(zero? (cdr (waitpid pid))))))))
(define console-keymap-service-type
(shepherd-service-type
'console-keymap
(lambda (files)
(shepherd-service
(documentation (string-append "Load console keymap (loadkeys)."))
(provision '(console-keymap))
(start #~(lambda _
(zero? (system* #$(file-append kbd "/bin/loadkeys")
#$@files))))
(respawn? #f)))))
(define (console-keymap-service . files)
"Return a service to load console keymaps from @var{files}."
(service console-keymap-service-type files))
(define %default-console-font
;; Note: 'LatGrkCyr-8x16' has the advantage of providing three common
;; scripts as well as glyphs for em dash, quotation marks, and other Unicode
;; codepoints notably found in the UTF-8 manual.
"LatGrkCyr-8x16")
(define (console-font-shepherd-services tty+font)
"Return a list of Shepherd services for each pair in TTY+FONT."
(map (match-lambda
((tty . font)
(let ((device (string-append "/dev/" tty)))
(shepherd-service
(documentation "Load a Unicode console font.")
(provision (list (symbol-append 'console-font-
(string->symbol tty))))
;; Start after mingetty has been started on TTY, otherwise the settings
;; are ignored.
(requirement (list (symbol-append 'term-
(string->symbol tty))))
(start #~(lambda _
(and #$(unicode-start device)
(zero?
(system* #$(file-append kbd "/bin/setfont")
"-C" #$device #$font)))))
(stop #~(const #t))
(respawn? #f)))))
tty+font))
(define console-font-service-type
(service-type (name 'console-fonts)
(extensions
(list (service-extension shepherd-root-service-type
console-font-shepherd-services)))
(compose concatenate)
(extend append)))
(define* (console-font-service tty #:optional (font "LatGrkCyr-8x16"))
"This procedure is deprecated in favor of @code{console-font-service-type}.
Return a service that sets up Unicode support in @var{tty} and loads
@var{font} for that tty (fonts are per virtual console in Linux.)"
(simple-service (symbol-append 'console-font- (string->symbol tty))
console-font-service-type `((,tty . ,font))))
(define %default-motd
(plain-file "motd" "This is the GNU operating system, welcome!\n\n"))
(define-record-type* <login-configuration>
login-configuration make-login-configuration
login-configuration?
(motd login-configuration-motd ;file-like
(default %default-motd))
;; Allow empty passwords by default so that first-time users can log in when
;; the 'root' account has just been created.
(allow-empty-passwords? login-configuration-allow-empty-passwords?
(default #t))) ;Boolean
(define (login-pam-service config)
"Return the list of PAM service needed for CONF."
;; Let 'login' be known to PAM.
(list (unix-pam-service "login"
#:allow-empty-passwords?
(login-configuration-allow-empty-passwords? config)
#:motd
(login-configuration-motd config))))
(define login-service-type
(service-type (name 'login)
(extensions (list (service-extension pam-root-service-type
login-pam-service)))))
(define* (login-service #:optional (config (login-configuration)))
"Return a service configure login according to @var{config}, which specifies
the message of the day, among other things."
(service login-service-type config))
(define-record-type* <agetty-configuration>
agetty-configuration make-agetty-configuration
agetty-configuration?
(agetty agetty-configuration-agetty ;<package>
(default util-linux))
(tty agetty-configuration-tty) ;string
(term agetty-term ;string | #f
(default #f))
(baud-rate agetty-baud-rate ;string | #f
(default #f))
(auto-login agetty-auto-login ;list of strings | #f
(default #f))
(login-program agetty-login-program ;gexp
(default (file-append shadow "/bin/login")))
(login-pause? agetty-login-pause? ;Boolean
(default #f))
(eight-bits? agetty-eight-bits? ;Boolean
(default #f))
(no-reset? agetty-no-reset? ;Boolean
(default #f))
(remote? agetty-remote? ;Boolean
(default #f))
(flow-control? agetty-flow-control? ;Boolean
(default #f))
(host agetty-host ;string | #f
(default #f))
(no-issue? agetty-no-issue? ;Boolean
(default #f))
(init-string agetty-init-string ;string | #f
(default #f))
(no-clear? agetty-no-clear? ;Boolean
(default #f))
(local-line agetty-local-line ;always | never | auto
(default #f))
(extract-baud? agetty-extract-baud? ;Boolean
(default #f))
(skip-login? agetty-skip-login? ;Boolean
(default #f))
(no-newline? agetty-no-newline? ;Boolean
(default #f))
(login-options agetty-login-options ;string | #f
(default #f))
(chroot agetty-chroot ;string | #f
(default #f))
(hangup? agetty-hangup? ;Boolean
(default #f))
(keep-baud? agetty-keep-baud? ;Boolean
(default #f))
(timeout agetty-timeout ;integer | #f
(default #f))
(detect-case? agetty-detect-case? ;Boolean
(default #f))
(wait-cr? agetty-wait-cr? ;Boolean
(default #f))
(no-hints? agetty-no-hints? ;Boolean
(default #f))
(no-hostname? agetty-no hostname? ;Boolean
(default #f))
(long-hostname? agetty-long-hostname? ;Boolean
(default #f))
(erase-characters agetty-erase-characters ;string | #f
(default #f))
(kill-characters agetty-kill-characters ;string | #f
(default #f))
(chdir agetty-chdir ;string | #f
(default #f))
(delay agetty-delay ;integer | #f
(default #f))
(nice agetty-nice ;integer | #f
(default #f))
;; "Escape hatch" for passing arbitrary command-line arguments.
(extra-options agetty-extra-options ;list of strings
(default '()))
;;; XXX Unimplemented for now!
;;; (issue-file agetty-issue-file ;file-like
;;; (default #f))
)
(define agetty-shepherd-service
(match-lambda
(($ <agetty-configuration> agetty tty term baud-rate auto-login
login-program login-pause? eight-bits? no-reset? remote? flow-control?
host no-issue? init-string no-clear? local-line extract-baud?
skip-login? no-newline? login-options chroot hangup? keep-baud? timeout
detect-case? wait-cr? no-hints? no-hostname? long-hostname?
erase-characters kill-characters chdir delay nice extra-options)
(list
(shepherd-service
(documentation "Run agetty on a tty.")
(provision (list (symbol-append 'term- (string->symbol tty))))
;; Since the login prompt shows the host name, wait for the 'host-name'
;; service to be done. Also wait for udev essentially so that the tty
;; text is not lost in the middle of kernel messages (see also
;; mingetty-shepherd-service).
(requirement '(user-processes host-name udev))
(start #~(make-forkexec-constructor
(list #$(file-append util-linux "/sbin/agetty")
#$@extra-options
#$@(if eight-bits?
#~("--8bits")
#~())
#$@(if no-reset?
#~("--noreset")
#~())
#$@(if remote?
#~("--remote")
#~())
#$@(if flow-control?
#~("--flow-control")
#~())
#$@(if host
#~("--host" #$host)
#~())
#$@(if no-issue?
#~("--noissue")
#~())
#$@(if init-string
#~("--init-string" #$init-string)
#~())
#$@(if no-clear?
#~("--noclear")
#~())
;;; FIXME This doesn't work as expected. According to agetty(8), if this option
;;; is not passed, then the default is 'auto'. However, in my tests, when that
;;; option is selected, agetty never presents the login prompt, and the
;;; term-ttyS0 service respawns every few seconds.
#$@(if local-line
#~(#$(match local-line
('auto "--local-line=auto")
('always "--local-line=always")
('never "-local-line=never")))
#~())
#$@(if extract-baud?
#~("--extract-baud")
#~())
#$@(if skip-login?
#~("--skip-login")
#~())
#$@(if no-newline?
#~("--nonewline")
#~())
#$@(if login-options
#~("--login-options" #$login-options)
#~())
#$@(if chroot
#~("--chroot" #$chroot)
#~())
#$@(if hangup?
#~("--hangup")
#~())
#$@(if keep-baud?
#~("--keep-baud")
#~())
#$@(if timeout
#~("--timeout" #$(number->string timeout))
#~())
#$@(if detect-case?
#~("--detect-case")
#~())
#$@(if wait-cr?
#~("--wait-cr")
#~())
#$@(if no-hints?
#~("--nohints?")
#~())
#$@(if no-hostname?
#~("--nohostname")
#~())
#$@(if long-hostname?
#~("--long-hostname")
#~())
#$@(if erase-characters
#~("--erase-chars" #$erase-characters)
#~())
#$@(if kill-characters
#~("--kill-chars" #$kill-characters)
#~())
#$@(if chdir
#~("--chdir" #$chdir)
#~())
#$@(if delay
#~("--delay" #$(number->string delay))
#~())
#$@(if nice
#~("--nice" #$(number->string nice))
#~())
#$@(if auto-login
(list "--autologin" auto-login)
'())
#$@(if login-program
#~("--login-program" #$login-program)
#~())
#$@(if login-pause?
#~("--login-pause")
#~())
#$tty
#$@(if baud-rate
#~(#$baud-rate)
#~())
#$@(if term
#~(#$term)
#~()))))
(stop #~(make-kill-destructor)))))))
(define agetty-service-type
(service-type (name 'agetty)
(extensions (list (service-extension shepherd-root-service-type
agetty-shepherd-service)))))
(define* (agetty-service config)
"Return a service to run agetty according to @var{config}, which specifies
the tty to run, among other things."
(service agetty-service-type config))
(define-record-type* <mingetty-configuration>
mingetty-configuration make-mingetty-configuration
mingetty-configuration?
(mingetty mingetty-configuration-mingetty ;<package>
(default mingetty))
(tty mingetty-configuration-tty) ;string
(auto-login mingetty-auto-login ;string | #f
(default #f))
(login-program mingetty-login-program ;gexp
(default #f))
(login-pause? mingetty-login-pause? ;Boolean
(default #f)))
(define mingetty-shepherd-service
(match-lambda
(($ <mingetty-configuration> mingetty tty auto-login login-program
login-pause?)
(list
(shepherd-service
(documentation "Run mingetty on an tty.")
(provision (list (symbol-append 'term- (string->symbol tty))))
;; Since the login prompt shows the host name, wait for the 'host-name'
;; service to be done. Also wait for udev essentially so that the tty
;; text is not lost in the middle of kernel messages (XXX).
(requirement '(user-processes host-name udev))
(start #~(make-forkexec-constructor
(list #$(file-append mingetty "/sbin/mingetty")
"--noclear" #$tty
#$@(if auto-login
#~("--autologin" #$auto-login)
#~())
#$@(if login-program
#~("--loginprog" #$login-program)
#~())
#$@(if login-pause?
#~("--loginpause")
#~()))))
(stop #~(make-kill-destructor)))))))
(define mingetty-service-type
(service-type (name 'mingetty)
(extensions (list (service-extension shepherd-root-service-type
mingetty-shepherd-service)))))
(define* (mingetty-service config)
"Return a service to run mingetty according to @var{config}, which specifies
the tty to run, among other things."
(service mingetty-service-type config))
(define-record-type* <nscd-configuration> nscd-configuration
make-nscd-configuration
nscd-configuration?
(log-file nscd-configuration-log-file ;string
(default "/var/log/nscd.log"))
(debug-level nscd-debug-level ;integer
(default 0))
;; TODO: See nscd.conf in glibc for other options to add.
(caches nscd-configuration-caches ;list of <nscd-cache>
(default %nscd-default-caches))
(name-services nscd-configuration-name-services ;list of <packages>
(default '()))
(glibc nscd-configuration-glibc ;<package>
(default (canonical-package glibc))))
(define-record-type* <nscd-cache> nscd-cache make-nscd-cache
nscd-cache?
(database nscd-cache-database) ;symbol
(positive-time-to-live nscd-cache-positive-time-to-live) ;integer
(negative-time-to-live nscd-cache-negative-time-to-live
(default 20)) ;integer
(suggested-size nscd-cache-suggested-size ;integer ("default module
;of hash table")
(default 211))
(check-files? nscd-cache-check-files? ;Boolean
(default #t))
(persistent? nscd-cache-persistent? ;Boolean
(default #t))
(shared? nscd-cache-shared? ;Boolean
(default #t))
(max-database-size nscd-cache-max-database-size ;integer
(default (* 32 (expt 2 20))))
(auto-propagate? nscd-cache-auto-propagate? ;Boolean
(default #t)))
(define %nscd-default-caches
;; Caches that we want to enable by default. Note that when providing an
;; empty nscd.conf, all caches are disabled.
(list (nscd-cache (database 'hosts)
;; Aggressively cache the host name cache to improve
;; privacy and resilience.
(positive-time-to-live (* 3600 12))
(negative-time-to-live 20)
(persistent? #t))
(nscd-cache (database 'services)
;; Services are unlikely to change, so we can be even more
;; aggressive.
(positive-time-to-live (* 3600 24))
(negative-time-to-live 3600)
(check-files? #t) ;check /etc/services changes
(persistent? #t))))
(define %nscd-default-configuration
;; Default nscd configuration.
(nscd-configuration))
(define (nscd.conf-file config)
"Return the @file{nscd.conf} configuration file for @var{config}, an
@code{<nscd-configuration>} object."
(define cache->config
(match-lambda
(($ <nscd-cache> (= symbol->string database)
positive-ttl negative-ttl size check-files?
persistent? shared? max-size propagate?)
(string-append "\nenable-cache\t" database "\tyes\n"
"positive-time-to-live\t" database "\t"
(number->string positive-ttl) "\n"
"negative-time-to-live\t" database "\t"
(number->string negative-ttl) "\n"
"suggested-size\t" database "\t"
(number->string size) "\n"
"check-files\t" database "\t"
(if check-files? "yes\n" "no\n")
"persistent\t" database "\t"
(if persistent? "yes\n" "no\n")
"shared\t" database "\t"
(if shared? "yes\n" "no\n")
"max-db-size\t" database "\t"
(number->string max-size) "\n"
"auto-propagate\t" database "\t"
(if propagate? "yes\n" "no\n")))))
(match config
(($ <nscd-configuration> log-file debug-level caches)
(plain-file "nscd.conf"
(string-append "\
# Configuration of libc's name service cache daemon (nscd).\n\n"
(if log-file
(string-append "logfile\t" log-file)
"")
"\n"
(if debug-level
(string-append "debug-level\t"
(number->string debug-level))
"")
"\n"
(string-concatenate
(map cache->config caches)))))))
(define (nscd-shepherd-service config)
"Return a shepherd service for CONFIG, an <nscd-configuration> object."
(let ((nscd.conf (nscd.conf-file config))
(name-services (nscd-configuration-name-services config)))
(list (shepherd-service
(documentation "Run libc's name service cache daemon (nscd).")
(provision '(nscd))
(requirement '(user-processes))
(start #~(make-forkexec-constructor
(list #$(file-append (nscd-configuration-glibc config)
"/sbin/nscd")
"-f" #$nscd.conf "--foreground")
;; Wait for the PID file. However, the PID file is
;; written before nscd is actually listening on its
;; socket (XXX).
#:pid-file "/var/run/nscd/nscd.pid"
#:environment-variables
(list (string-append "LD_LIBRARY_PATH="
(string-join
(map (lambda (dir)
(string-append dir "/lib"))
(list #$@name-services))
":")))))
(stop #~(make-kill-destructor))))))
(define nscd-activation
;; Actions to take before starting nscd.
#~(begin
(use-modules (guix build utils))
(mkdir-p "/var/run/nscd")
(mkdir-p "/var/db/nscd"))) ;for the persistent cache
(define nscd-service-type
(service-type (name 'nscd)
(extensions
(list (service-extension activation-service-type
(const nscd-activation))
(service-extension shepherd-root-service-type
nscd-shepherd-service)))
;; This can be extended by providing additional name services
;; such as nss-mdns.
(compose concatenate)
(extend (lambda (config name-services)
(nscd-configuration
(inherit config)
(name-services (append
(nscd-configuration-name-services config)
name-services)))))))
(define* (nscd-service #:optional (config %nscd-default-configuration))
"Return a service that runs libc's name service cache daemon (nscd) with the
given @var{config}---an @code{<nscd-configuration>} object. @xref{Name
Service Switch}, for an example."
(service nscd-service-type config))
(define-record-type* <syslog-configuration>
syslog-configuration make-syslog-configuration
syslog-configuration?
(syslogd syslog-configuration-syslogd
(default (file-append inetutils "/libexec/syslogd")))
(config-file syslog-configuration-config-file
(default %default-syslog.conf)))
(define syslog-service-type
(shepherd-service-type
'syslog
(lambda (config)
(shepherd-service
(documentation "Run the syslog daemon (syslogd).")
(provision '(syslogd))
(requirement '(user-processes))
(start #~(make-forkexec-constructor
(list #$(syslog-configuration-syslogd config)
"--rcfile" #$(syslog-configuration-config-file config))
#:pid-file "/var/run/syslog.pid"))
(stop #~(make-kill-destructor))))))
;; Snippet adapted from the GNU inetutils manual.
(define %default-syslog.conf
(plain-file "syslog.conf" "
# Log all error messages, authentication messages of
# level notice or higher and anything of level err or
# higher to the console.
# Don't log private authentication messages!
*.alert;auth.notice;authpriv.none /dev/console
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none /var/log/messages
# Same, in a different place.
*.info;mail.none;authpriv.none /dev/tty12
# The authpriv file has restricted access.
authpriv.* /var/log/secure
# Log all the mail messages in one place.
mail.* /var/log/maillog
"))
(define* (syslog-service #:optional (config (syslog-configuration)))
"Return a service that runs @command{syslogd} and takes
@var{<syslog-configuration>} as a parameter.
@xref{syslogd invocation,,, inetutils, GNU Inetutils}, for more
information on the configuration file syntax."
(service syslog-service-type config))
(define pam-limits-service-type
(let ((security-limits
;; Create /etc/security containing the provided "limits.conf" file.
(lambda (limits-file)
`(("security"
,(computed-file
"security"
#~(begin
(mkdir #$output)
(stat #$limits-file)
(symlink #$limits-file
(string-append #$output "/limits.conf"))))))))
(pam-extension
(lambda (pam)
(let ((pam-limits (pam-entry
(control "required")
(module "pam_limits.so")
(arguments '("conf=/etc/security/limits.conf")))))
(if (member (pam-service-name pam)
'("login" "su" "slim"))
(pam-service
(inherit pam)
(session (cons pam-limits
(pam-service-session pam))))
pam)))))
(service-type
(name 'limits)
(extensions
(list (service-extension etc-service-type security-limits)
(service-extension pam-root-service-type
(lambda _ (list pam-extension))))))))
(define* (pam-limits-service #:optional (limits '()))
"Return a service that makes selected programs respect the list of
pam-limits-entry specified in LIMITS via pam_limits.so."
(service pam-limits-service-type
(plain-file "limits.conf"
(string-join (map pam-limits-entry->string limits)
"\n"))))
\f
;;;
;;; Guix services.
;;;
(define* (guix-build-accounts count #:key
(group "guixbuild")
(first-uid 30001)
(shadow shadow))
"Return a list of COUNT user accounts for Guix build users, with UIDs
starting at FIRST-UID, and under GID."
(unfold (cut > <> count)
(lambda (n)
(user-account
(name (format #f "guixbuilder~2,'0d" n))
(system? #t)
(uid (+ first-uid n -1))
(group group)
;; guix-daemon expects GROUP to be listed as a
;; supplementary group too:
;; <http://lists.gnu.org/archive/html/bug-guix/2013-01/msg00239.html>.
(supplementary-groups (list group "kvm"))
(comment (format #f "Guix Build User ~2d" n))
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin"))))
1+
1))
(define (hydra-key-authorization key guix)
"Return a gexp with code to register KEY, a file containing a 'guix archive'
public key, with GUIX."
#~(unless (file-exists? "/etc/guix/acl")
(let ((pid (primitive-fork)))
(case pid
((0)
(let* ((key #$key)
(port (open-file key "r0b")))
(format #t "registering public key '~a'...~%" key)
(close-port (current-input-port))
(dup port 0)
(execl #$(file-append guix "/bin/guix")
"guix" "archive" "--authorize")
(exit 1)))
(else
(let ((status (cdr (waitpid pid))))
(unless (zero? status)
(format (current-error-port) "warning: \
failed to register hydra.gnu.org public key: ~a~%" status))))))))
(define %default-authorized-guix-keys
;; List of authorized substitute keys.
(list (file-append guix "/share/guix/hydra.gnu.org.pub")))
(define-record-type* <guix-configuration>
guix-configuration make-guix-configuration
guix-configuration?
(guix guix-configuration-guix ;<package>
(default guix))
(build-group guix-configuration-build-group ;string
(default "guixbuild"))
(build-accounts guix-configuration-build-accounts ;integer
(default 10))
(authorize-key? guix-configuration-authorize-key? ;Boolean
(default #t))
(authorized-keys guix-configuration-authorized-keys ;list of gexps
(default %default-authorized-guix-keys))
(use-substitutes? guix-configuration-use-substitutes? ;Boolean
(default #t))
(substitute-urls guix-configuration-substitute-urls ;list of strings
(default %default-substitute-urls))
(extra-options guix-configuration-extra-options ;list of strings
(default '()))
(log-file guix-configuration-log-file ;string
(default "/var/log/guix-daemon.log"))
(lsof guix-configuration-lsof ;<package>
(default lsof))
(http-proxy guix-http-proxy ;string | #f
(default #f))
(tmpdir guix-tmpdir ;string | #f
(default #f)))
(define %default-guix-configuration
(guix-configuration))
(define (guix-shepherd-service config)
"Return a <shepherd-service> for the Guix daemon service with CONFIG."
(match config
(($ <guix-configuration> guix build-group build-accounts
authorize-key? keys
use-substitutes? substitute-urls extra-options
log-file lsof http-proxy tmpdir)
(list (shepherd-service
(documentation "Run the Guix daemon.")
(provision '(guix-daemon))
(requirement '(user-processes))
(start
#~(make-forkexec-constructor
(list #$(file-append guix "/bin/guix-daemon")
"--build-users-group" #$build-group
#$@(if use-substitutes?
'()
'("--no-substitutes"))
"--substitute-urls" #$(string-join substitute-urls)
#$@extra-options)
;; Add 'lsof' (for the GC) to the daemon's $PATH.
#:environment-variables
(list (string-append "PATH=" #$lsof "/bin")
#$@(if http-proxy
(list (string-append "http_proxy=" http-proxy))
'())
#$@(if tmpdir
(list (string-append "TMPDIR=" tmpdir))
'()))
#:log-file #$log-file))
(stop #~(make-kill-destructor)))))))
(define (guix-accounts config)
"Return the user accounts and user groups for CONFIG."
(match config
(($ <guix-configuration> _ build-group build-accounts)
(cons (user-group
(name build-group)
(system? #t)
;; Use a fixed GID so that we can create the store with the right
;; owner.
(id 30000))
(guix-build-accounts build-accounts
#:group build-group)))))
(define (guix-activation config)
"Return the activation gexp for CONFIG."
(match config
(($ <guix-configuration> guix build-group build-accounts authorize-key? keys)
;; Assume that the store has BUILD-GROUP as its group. We could
;; otherwise call 'chown' here, but the problem is that on a COW unionfs,
;; chown leads to an entire copy of the tree, which is a bad idea.
;; Optionally authorize hydra.gnu.org's key.
(if authorize-key?
#~(begin
#$@(map (cut hydra-key-authorization <> guix) keys))
#~#f))))
(define guix-service-type
(service-type
(name 'guix)
(extensions
(list (service-extension shepherd-root-service-type guix-shepherd-service)
(service-extension account-service-type guix-accounts)
(service-extension activation-service-type guix-activation)
(service-extension profile-service-type
(compose list guix-configuration-guix))))))
(define* (guix-service #:optional (config %default-guix-configuration))
"Return a service that runs the Guix build daemon according to
@var{config}."
(service guix-service-type config))
(define-record-type* <guix-publish-configuration>
guix-publish-configuration make-guix-publish-configuration
guix-publish-configuration?
(guix guix-publish-configuration-guix ;package
(default guix))
(port guix-publish-configuration-port ;number
(default 80))
(host guix-publish-configuration-host ;string
(default "localhost")))
(define guix-publish-shepherd-service
(match-lambda
(($ <guix-publish-configuration> guix port host)
(list (shepherd-service
(provision '(guix-publish))
(requirement '(guix-daemon))
(start #~(make-forkexec-constructor
(list #$(file-append guix "/bin/guix")
"publish" "-u" "guix-publish"
"-p" #$(number->string port)
(string-append "--listen=" #$host))))
(stop #~(make-kill-destructor)))))))
(define %guix-publish-accounts
(list (user-group (name "guix-publish") (system? #t))
(user-account
(name "guix-publish")
(group "guix-publish")
(system? #t)
(comment "guix publish user")
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin")))))
(define guix-publish-service-type
(service-type (name 'guix-publish)
(extensions
(list (service-extension shepherd-root-service-type
guix-publish-shepherd-service)
(service-extension account-service-type
(const %guix-publish-accounts))))))
(define* (guix-publish-service #:key (guix guix) (port 80) (host "localhost"))
"Return a service that runs @command{guix publish} listening on @var{host}
and @var{port} (@pxref{Invoking guix publish}).
This assumes that @file{/etc/guix} already contains a signing key pair as
created by @command{guix archive --generate-key} (@pxref{Invoking guix
archive}). If that is not the case, the service will fail to start."
(service guix-publish-service-type
(guix-publish-configuration (guix guix) (port port) (host host))))
\f
;;;
;;; Udev.
;;;
(define-record-type* <udev-configuration>
udev-configuration make-udev-configuration
udev-configuration?
(udev udev-configuration-udev ;<package>
(default udev))
(rules udev-configuration-rules ;list of <package>
(default '())))
(define (udev-rules-union packages)
"Return the union of the @code{lib/udev/rules.d} directories found in each
item of @var{packages}."
(define build
(with-imported-modules '((guix build union)
(guix build utils))
#~(begin
(use-modules (guix build union)
(guix build utils)
(srfi srfi-1)
(srfi srfi-26))
(define %standard-locations
'("/lib/udev/rules.d" "/libexec/udev/rules.d"))
(define (rules-sub-directory directory)
;; Return the sub-directory of DIRECTORY containing udev rules, or
;; #f if none was found.
(find directory-exists?
(map (cut string-append directory <>) %standard-locations)))
(mkdir-p (string-append #$output "/lib/udev"))
(union-build (string-append #$output "/lib/udev/rules.d")
(filter-map rules-sub-directory '#$packages)))))
(computed-file "udev-rules" build))
(define (udev-rule file-name contents)
"Return a directory with a udev rule file FILE-NAME containing CONTENTS."
(computed-file file-name
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils))
(define rules.d
(string-append #$output "/lib/udev/rules.d"))
(mkdir-p rules.d)
(call-with-output-file
(string-append rules.d "/" #$file-name)
(lambda (port)
(display #$contents port)))))))
(define kvm-udev-rule
;; Return a directory with a udev rule that changes the group of /dev/kvm to
;; "kvm" and makes it #o660. Apparently QEMU-KVM used to ship this rule,
;; but now we have to add it by ourselves.
;; Build users are part of the "kvm" group, so we can fearlessly make
;; /dev/kvm 660 (see <http://bugs.gnu.org/18994>, for background.)
(udev-rule "90-kvm.rules"
"KERNEL==\"kvm\", GROUP=\"kvm\", MODE=\"0660\"\n"))
(define udev-shepherd-service
;; Return a <shepherd-service> for UDEV with RULES.
(match-lambda
(($ <udev-configuration> udev rules)
(let* ((rules (udev-rules-union (cons* udev kvm-udev-rule rules)))
(udev.conf (computed-file "udev.conf"
#~(call-with-output-file #$output
(lambda (port)
(format port
"udev_rules=\"~a/lib/udev/rules.d\"\n"
#$rules))))))
(list
(shepherd-service
(provision '(udev))
;; Udev needs /dev to be a 'devtmpfs' mount so that new device nodes can
;; be added: see
;; <http://www.linuxfromscratch.org/lfs/view/development/chapter07/udev.html>.
(requirement '(root-file-system))
(documentation "Populate the /dev directory, dynamically.")
(start #~(lambda ()
(define find
(@ (srfi srfi-1) find))
(define udevd
;; Choose the right 'udevd'.
(find file-exists?
(map (lambda (suffix)
(string-append #$udev suffix))
'("/libexec/udev/udevd" ;udev
"/sbin/udevd")))) ;eudev
(define (wait-for-udevd)
;; Wait until someone's listening on udevd's control
;; socket.
(let ((sock (socket AF_UNIX SOCK_SEQPACKET 0)))
(let try ()
(catch 'system-error
(lambda ()
(connect sock PF_UNIX "/run/udev/control")
(close-port sock))
(lambda args
(format #t "waiting for udevd...~%")
(usleep 500000)
(try))))))
;; Allow udev to find the modules.
(setenv "LINUX_MODULE_DIRECTORY"
"/run/booted-system/kernel/lib/modules")
;; The first one is for udev, the second one for eudev.
(setenv "UDEV_CONFIG_FILE" #$udev.conf)
(setenv "EUDEV_RULES_DIRECTORY"
#$(file-append rules "/lib/udev/rules.d"))
(let ((pid (primitive-fork)))
(case pid
((0)
(exec-command (list udevd)))
(else
;; Wait until udevd is up and running. This
;; appears to be needed so that the events
;; triggered below are actually handled.
(wait-for-udevd)
;; Trigger device node creation.
(system* #$(file-append udev "/bin/udevadm")
"trigger" "--action=add")
;; Wait for things to settle down.
(system* #$(file-append udev "/bin/udevadm")
"settle")
pid)))))
(stop #~(make-kill-destructor))
;; When halting the system, 'udev' is actually killed by
;; 'user-processes', i.e., before its own 'stop' method was called.
;; Thus, make sure it is not respawned.
(respawn? #f)))))))
(define udev-service-type
(service-type (name 'udev)
(extensions
(list (service-extension shepherd-root-service-type
udev-shepherd-service)))
(compose concatenate) ;concatenate the list of rules
(extend (lambda (config rules)
(match config
(($ <udev-configuration> udev initial-rules)
(udev-configuration
(udev udev)
(rules (append initial-rules rules)))))))))
(define* (udev-service #:key (udev eudev) (rules '()))
"Run @var{udev}, which populates the @file{/dev} directory dynamically. Get
extra rules from the packages listed in @var{rules}."
(service udev-service-type
(udev-configuration (udev udev) (rules rules))))
(define swap-service-type
(shepherd-service-type
'swap
(lambda (device)
(define requirement
(if (string-prefix? "/dev/mapper/" device)
(list (symbol-append 'device-mapping-
(string->symbol (basename device))))
'()))
(shepherd-service
(provision (list (symbol-append 'swap- (string->symbol device))))
(requirement `(udev ,@requirement))
(documentation "Enable the given swap device.")
(start #~(lambda ()
(restart-on-EINTR (swapon #$device))
#t))
(stop #~(lambda _
(restart-on-EINTR (swapoff #$device))
#f))
(respawn? #f)))))
(define (swap-service device)
"Return a service that uses @var{device} as a swap device."
(service swap-service-type device))
(define-record-type* <gpm-configuration>
gpm-configuration make-gpm-configuration gpm-configuration?
(gpm gpm-configuration-gpm) ;package
(options gpm-configuration-options)) ;list of strings
(define gpm-shepherd-service
(match-lambda
(($ <gpm-configuration> gpm options)
(list (shepherd-service
(requirement '(udev))
(provision '(gpm))
(start #~(lambda ()
;; 'gpm' runs in the background and sets a PID file.
;; Note that it requires running as "root".
(false-if-exception (delete-file "/var/run/gpm.pid"))
(fork+exec-command (list #$(file-append gpm "/sbin/gpm")
#$@options))
;; Wait for the PID file to appear; declare failure if
;; it doesn't show up.
(let loop ((i 3))
(or (file-exists? "/var/run/gpm.pid")
(if (zero? i)
#f
(begin
(sleep 1)
(loop (1- i))))))))
(stop #~(lambda (_)
;; Return #f if successfully stopped.
(not (zero? (system* #$(file-append gpm "/sbin/gpm")
"-k"))))))))))
(define gpm-service-type
(service-type (name 'gpm)
(extensions
(list (service-extension shepherd-root-service-type
gpm-shepherd-service)))))
(define* (gpm-service #:key (gpm gpm)
(options '("-m" "/dev/input/mice" "-t" "ps2")))
"Run @var{gpm}, the general-purpose mouse daemon, with the given
command-line @var{options}. GPM allows users to use the mouse in the console,
notably to select, copy, and paste text. The default value of @var{options}
uses the @code{ps2} protocol, which works for both USB and PS/2 mice.
This service is not part of @var{%base-services}."
;; To test in QEMU, use "-usbdevice mouse" and then, in the monitor, use
;; "info mice" and "mouse_set X" to use the right mouse.
(service gpm-service-type
(gpm-configuration (gpm gpm) (options options))))
(define-record-type* <kmscon-configuration>
kmscon-configuration make-kmscon-configuration
kmscon-configuration?
(kmscon kmscon-configuration-kmscon
(default kmscon))
(virtual-terminal kmscon-configuration-virtual-terminal)
(login-program kmscon-configuration-login-program
(default (file-append shadow "/bin/login")))
(login-arguments kmscon-configuration-login-arguments
(default '("-p")))
(hardware-acceleration? kmscon-configuration-hardware-acceleration?
(default #f))) ; #t causes failure
(define kmscon-service-type
(shepherd-service-type
'kmscon
(lambda (config)
(let ((kmscon (kmscon-configuration-kmscon config))
(virtual-terminal (kmscon-configuration-virtual-terminal config))
(login-program (kmscon-configuration-login-program config))
(login-arguments (kmscon-configuration-login-arguments config))
(hardware-acceleration? (kmscon-configuration-hardware-acceleration? config)))
(define kmscon-command
#~(list
#$(file-append kmscon "/bin/kmscon") "--login"
"--vt" #$virtual-terminal
#$@(if hardware-acceleration? '("--hwaccel") '())
"--" #$login-program #$@login-arguments))
(shepherd-service
(documentation "kmscon virtual terminal")
(requirement '(user-processes udev dbus-system))
(provision (list (symbol-append 'term- (string->symbol virtual-terminal))))
(start #~(make-forkexec-constructor #$kmscon-command))
(stop #~(make-kill-destructor)))))))
\f
(define %base-services
;; Convenience variable holding the basic services.
(list (login-service)
(service console-font-service-type
(map (lambda (tty)
(cons tty %default-console-font))
'("tty1" "tty2" "tty3" "tty4" "tty5" "tty6")))
(mingetty-service (mingetty-configuration
(tty "tty1")))
(mingetty-service (mingetty-configuration
(tty "tty2")))
(mingetty-service (mingetty-configuration
(tty "tty3")))
(mingetty-service (mingetty-configuration
(tty "tty4")))
(mingetty-service (mingetty-configuration
(tty "tty5")))
(mingetty-service (mingetty-configuration
(tty "tty6")))
(service static-networking-service-type
(list (static-networking (interface "lo")
(ip "127.0.0.1")
(provision '(loopback)))))
(syslog-service)
(urandom-seed-service)
(guix-service)
(nscd-service)
;; The LVM2 rules are needed as soon as LVM2 or the device-mapper is
;; used, so enable them by default. The FUSE and ALSA rules are
;; less critical, but handy.
(udev-service #:rules (list lvm2 fuse alsa-utils crda))
(service special-files-service-type
`(("/bin/sh" ,(file-append (canonical-package bash)
"/bin/sh"))))))
;;; base.scm ends here
|